Updates for omnibus-software for AIX

Compiler flags and updates to allow embedded software to be built on AIX with the XLC toolchain.
ah, i got it.  i was reading `Marshal.load(Marshal.dump(ENV))` which was really confusing me.

```ruby
patch_env = env.dup
patch_env['PATH'] = "/opt/freeware/bin:#{env['PATH']}" if aix?
```

should do it.